646483121 has 8 divisors (see below), whose sum is σ = 662856264. Its totient is φ = 630138880.

The previous prime is 646483081. The next prime is 646483133. The reversal of 646483121 is 121384646.

It can be written as a sum of positive squares in 4 ways, for example, as 3150625 + 643332496 = 1775^2 + 25364^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 646483121 - 2¹⁸ = 646220977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646483171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42305 + ... + 55521.

It is an arithmetic number, because the mean of its divisors is an integer number (82857033).

Almost surely, 2^646483121 is an apocalyptic number.

It is an amenable number.

646483121 is a deficient number, since it is larger than the sum of its proper divisors (16373143).

646483121 is a wasteful number, since it uses less digits than its factorization.

646483121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14451.

The product of its digits is 27648, while the sum is 35.

The square root of 646483121 is about 25426.0323487563. The cubic root of 646483121 is about 864.6739929997.

The spelling of 646483121 in words is "six hundred forty-six million, four hundred eighty-three thousand, one hundred twenty-one".